CN102074346B - Drying process of high-voltage current transformer body - Google Patents
Drying process of high-voltage current transformer body Download PDFInfo
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- CN102074346B CN102074346B CN201010573052XA CN201010573052A CN102074346B CN 102074346 B CN102074346 B CN 102074346B CN 201010573052X A CN201010573052X A CN 201010573052XA CN 201010573052 A CN201010573052 A CN 201010573052A CN 102074346 B CN102074346 B CN 102074346B
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Abstract
The invention relates to a drying process of a high-voltage current transformer body, which belongs to the field of high-voltage transformer manufacturing process. The drying process comprises the technical scheme that: the vacuum drying of a current transformer body is carried out by a vacuum drying method, and the vacuum drying process comprises a temperature rise stage, an intermittent vacuum stage, a low vacuum stage, a high vacuum stage and a cooling stage; and water in the high-voltage current transformer body is thoroughly discharged by controlling different stages of temperature, vacuum degree and time, and the drying time of each stage is determined by an insulation thickness and a voltage class. The water in the high-voltage current transformer body is thoroughly discharged by controlling different stages of temperature, vacuum degree and time, so that the water content, hydrogen content, dielectric loss and voltage resistance of the high-voltage current transformer product exceed national standard values, and the high-voltage current transformer has the characteristics of thorough drying, energy saving, time saving and large furnace inlet capacity, is convenient to operate, is safe and the like.
Description
Technical field
The present invention relates to a kind of high-tension current inductor device body drying process, belong to high-voltage mutual inductor manufacturing process field.
Background technology
The high-tension current inductor product is thicker because of device body main insulation material; General vacuumize is difficult to remove its inner deep layer moisture content; The result causes product after operation a period of time; Repair in shop reason is returned in rises such as its water content, hydrogen content, Jie's damage, is difficult to guarantee the quality of product, also becomes one of technical problem that this area needs to be resolved hurrily.
Summary of the invention
The purpose of the utility model provides a kind of high-tension current inductor device body drying process, can be thoroughly dry, can shorten drying time again, and energy savings solves the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: adopt vacuum drying mode that high-tension current inductor device body is carried out vacuumize; 1. process of vacuum drying is divided into temperature rise period, 2. intermittent vacuum stage, 3. low vacuum stage, 4. high vacuum stage of Fig, 5. temperature-fall period; Through control to temperature, vacuum degree and the time of different phase; Moisture content in the high-tension current inductor device body is thoroughly discharged, confirm by insulation thickness and electric pressure each drying time in stage.
Processing step is following more specifically for high-tension current inductor device body drying process:
1. temperature rise period: adopt speed to be warmed up to 105 ± 5 ℃, insulating material is heated up and begin to discharge moisture content smaller or equal to 10 ℃/h;
2. intermittent vacuum stage: through being evacuated down to more than or equal to 0.055MPa, less than 0.08MPa; The moisture content of discharging in the device body is taken away; When removing vacuum, be convenient to moisture content discharge in the material, keep 105 ± 5 ℃ of temperature to come the required energy of moisture content gasification in the supplementary material through heating simultaneously;
3. low vacuum stage:, reduce diffusion and discharge that steam partial pressure around the insulating material helps the insulating material internal moisture through vacuumizing and keep the mode of 0.08MPa;
4. high vacuum stage of Fig: mainly remove the moisture content that is difficult for being evaporated remaining in the insulating material, this part moisture content generally receives the obstruct of outer heavy insulation and the suction-operated of insulating material fiber, is difficult for getting rid of, and gas clean-up also keeps vacuum degree greater than 80Pa;
5. temperature-fall period: after high vacuum stage of Fig finishes, directly do not come out of the stove, through a temperature-fall period, temperature is reduced to below 80 ℃ by 105 ± 5 ℃, remove vacuum and come out of the stove, it is dry to accomplish current transformer device body.
Confirm by insulation thickness and electric pressure each drying time in stage.
Confirm that those of ordinary skills can confirm the suitable time according to high-tension current inductor insulation thickness and electric pressure, need not special qualification each drying time in stage of the present invention by insulation thickness and electric pressure.
The present invention makes water content, hydrogen content, the withstand voltage GB required value that surpasses of high-tension current inductor product through to high-tension current inductor device body vacuumize different phase temperature, vacuum degree and the control of time.
Beneficial effect of the present invention: through different phase in the vacuumize to the moisture content in the thorough displacer body of the control of temperature, vacuum degree and time; Thereby the water content, hydrogen content, Jie that make the high-tension current inductor product are decreased, the withstand voltage GB required value that surpasses, have dry thoroughly, energy savings, save time, go into characteristics such as the stove amount is big, operation is convenient, safety.
Description of drawings
Fig. 1 is temperature, time, the vacuum degree graph of a relation of the embodiment of the invention.
Among the figure: 1. temperature rise period; 2. intermittent vacuum stage; 3. low vacuum stage; 4. high vacuum stage of Fig; 5. temperature-fall period.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further specified.
Vacuum drying process of the present invention is that vacuumize is divided into five stages: 1. temperature rise period; 2. intermittent vacuum stage; 3. low vacuum stage; 4. high vacuum stage of Fig; 5. temperature-fall period.The vacuum degree in each stage and temperature are handled by shown in Figure 1, confirm by insulation thickness and electric pressure, so just can the moisture content in the high-tension current inductor device body thoroughly be discharged drying time.
Concrete processing step:
1. temperature rise period: adopt speed to be warmed up to 105 ± 5 ℃, insulating material is heated up and begin to discharge moisture content smaller or equal to 10 ℃/h;
2. intermittent vacuum stage: through being evacuated down to 0.055MPa the moisture content of discharging in the device body is taken away, when removing vacuum, be convenient in the material moisture content and discharge, keep 105 ± 5 ℃ of temperature to come in the supplementary material moisture content required energy that gasifies through heating simultaneously;
3. low vacuum stage:, reduce diffusion and discharge that steam partial pressure around the insulating material helps the insulating material internal moisture through vacuumizing and keep the mode of 0.08MPa;
4. high vacuum stage of Fig: mainly remove the moisture content that is difficult for being evaporated remaining in the insulating material; This part moisture content generally receives the obstruct of outer heavy insulation and the suction-operated of insulating material fiber; Be difficult for to get rid of, must gas clean-up and keep vacuum degree at 80Pa or higher;
5. temperature-fall period: after high vacuum stage of Fig finishes, cannot directly come out of the stove, must temperature reduced to below 80 ℃ by 105 ± 5 ℃, can remove vacuum and come out of the stove through a temperature-fall period.The surface, back absorbs airborne moisture content very soon and makes moist otherwise insulating material is come out of the stove, and has reduced drying effect.
Claims (1)
1. high-tension current inductor device body drying means; It is characterized in that adopting vacuum drying mode that current transformer device body is carried out vacuumize; 1. process of vacuum drying is divided into temperature rise period, 2. intermittent vacuum stage, 3. low vacuum stage, 4. high vacuum stage of Fig, 5. temperature-fall period; Through control to temperature, vacuum degree and the time of different phase; Moisture content in the high-tension current inductor device body is thoroughly discharged, and confirm that by insulation thickness and electric pressure concrete processing step is following each drying time in stage:
1. temperature rise period: adopt speed to be warmed up to 105 ± 5 ℃, insulating material is heated up and begin to discharge moisture content smaller or equal to 10 ℃/h;
2. intermittent vacuum stage: through being evacuated down to more than or equal to 0.055MPa, less than 0.08MPa; The moisture content of discharging in the device body is taken away; When removing vacuum, be convenient to moisture content discharge in the material, keep 105 ± 5 ℃ of temperature to come the required energy of moisture content gasification in the supplementary material through heating simultaneously;
3. low vacuum stage:, reduce diffusion and discharge that steam partial pressure around the insulating material helps the insulating material internal moisture through vacuumizing and keep the mode of 0.08MPa;
4. high vacuum stage of Fig: mainly remove the moisture content that is difficult for being evaporated remaining in the insulating material, this part moisture content generally receives the obstruct of outer heavy insulation and the suction-operated of insulating material fiber, is difficult for getting rid of, and gas clean-up also keeps vacuum degree greater than 80Pa;
5. temperature-fall period: after high vacuum stage of Fig finishes, directly do not come out of the stove, through a temperature-fall period, temperature is reduced to below 80 ℃ by 105 ± 5 ℃, remove vacuum and come out of the stove, it is dry to accomplish current transformer device body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010573052XA CN102074346B (en) | 2010-12-06 | 2010-12-06 | Drying process of high-voltage current transformer body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010573052XA CN102074346B (en) | 2010-12-06 | 2010-12-06 | Drying process of high-voltage current transformer body |
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| Publication Number | Publication Date |
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| CN102074346A CN102074346A (en) | 2011-05-25 |
| CN102074346B true CN102074346B (en) | 2012-05-30 |
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| CN201010573052XA Expired - Fee Related CN102074346B (en) | 2010-12-06 | 2010-12-06 | Drying process of high-voltage current transformer body |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048481B (en) * | 2014-06-16 | 2016-04-27 | 广东电网公司电力科学研究院 | The vacuum drying method of electrical equipment |
| CN105977014B (en) * | 2016-06-27 | 2019-01-22 | 河南平高通用电气有限公司 | A kind of drying means of current mutual inductor coil |
| CN107917937A (en) * | 2017-11-21 | 2018-04-17 | 保定天威互感器有限公司 | A kind of low pressure dielectric loss on-line monitoring method of determining device body degree of drying |
| CN112069729B (en) * | 2020-08-28 | 2022-04-22 | 福州大学 | Voltage division method of multi-stage insulation dry type current transformer |
| CN114649142A (en) * | 2020-12-18 | 2022-06-21 | 特变电工智能电气有限责任公司 | Transformer and production method thereof |
| CN113532029A (en) * | 2021-06-24 | 2021-10-22 | 华能伊敏煤电有限责任公司 | Drying device and drying method for insulating and wetting treatment of current transformer with large ampere turns |
| CN113834312B (en) * | 2021-10-11 | 2022-10-04 | 山东泰开互感器有限公司 | Gas phase drying process and device for oil-immersed inverted current transformer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009149916A (en) * | 2006-09-14 | 2009-07-09 | Ulvac Japan Ltd | Vacuum vapor processing apparatus |
| CN201196896Y (en) * | 2007-12-12 | 2009-02-18 | 天津市三源电力变压器公司 | Vacuum hot oil spraying and drying system of ultra-large transformer |
| CN101634290B (en) * | 2009-08-04 | 2011-09-14 | 上海师范大学 | Method for drying hermetic compressor by ohmic heating |
| CN101692402B (en) * | 2009-09-24 | 2012-02-29 | 保定天威集团有限公司 | Method and device for drying large-scale power transformer |
| CN201478113U (en) * | 2009-09-24 | 2010-05-19 | 保定天威集团有限公司 | Drying device for large power transformer |
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